Adding local plugin in the left navigation menu in Moodle - moodle

Question

I would add my local plugin in the left navigation menu. However, the code block I wrote in the lib.php is not running and not displaying my plugin in the navigation menu.
Could you please help me?
Here is my lib.php
<?php
function local_glossary_extend_navigation(global_navigation $navigation){
$main_node = $navigation->add(get_string('glossary','local_glossary'), '/local/glossary/');
$main_node->nodetype=1;
$main_node->collapse = false;
$main_node->forceopen = true;
$main_node->isexpendable = false;
$main_node->showinflatnavigation = true;
}
This is my version.php
<?php
$plugin->version = 2020061510.00;
$plugin->requires = 2020060900;
$plugin->component = 'local_glossary';
$plugin->cron = 0;
$plugin->release = '1.0';
$plugin->maturity = MATURITY_STABLE;
This is my index.php
$PAGE->set_url('/local/glossary/index.php');
$PAGE->set_context(context_system::instance());
$PAGE->requires->jquery();
require_login();
$strpagetitle=get_string('glossary','local_glossary');
$strpageheading=get_string('glossary','local_glossary');
$PAGE->set_title($strpagetitle);
$PAGE->set_heading($strpageheading);

Answer 1

The "Site Admin" menu?
If so, you should add menus via the /local/glossary/settings.php file
There is an answer here - Moodle - how to add navigation menu in left side menu bar
For more details see - https://docs.moodle.org/dev/Navigation_API#Settings_navigation